Single-Chip Voice Recording & Playback Device for Multiple 40- to 60-Second Messages

Page 9

Figure 5 shows the device configured in random access

mode. The device is using eight message segments, the max-

imum available, in this mode. Note that message trigger pins

that are not used, for modes with less than eight segments,

can be left unconnected with the exception of pin

/M8_Option which should be pulled to VCC through a 100k

resistor

Figure 5 Random Access Mode

/M 1_M essage

/M 2_N ext

/M 3

/M 5

/M 4

/M 6

O scR

/M 7_E N D

/M 8_O ption

/B usy

BE

VSSD

VSSA

SP+

APR9600

V CCD

/R E

ExtC lk

M SEL2

M SEL1

/C E

/S trobe

A na_O ut

Ana_In

AG C

MicR ef

MicIn

V CCA

SP-

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Vcc

100 k

38 k

Flashing record / play Indicator LED

100 k

220 k

4.7µF

0.1µF

0.1µF

0.1µF

Vcc

0.1µF

22µF

Vcc

100 k

Rewind sw itch

Slide action record / playback switch

M3 message trigger pin

Electret

M icrophone

4.7k

4.7k

+

_

M1 message trigger pin

M4 message trigger pin

M5 message trigger pin

M6 message trigger pin

M7 message trigger pin

M8 message trigger pin

M2 message trigger pin

Busy Indicator LED

22µF

1k

APR9600

APLUS